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Sound reproducing apparatus

Sound reproducing apparatus description/claims

The present invention relates to a sound reproducing apparatus that can reproduce channels in which sounds having different frequency characteristics are recorded (e.g., woofer channels for CD and DVD) under a single acoustic field environment and with a good sound quality.

Japanese Patent Unexamined Publication No. 2001-112098 discloses a technique for a conventional sound reproducing apparatus. When this technique is used to reproduce a two channel source such as CD and a multi channel source including a woofer channel such as DVD in which only a low frequency is recorded under a single acoustic field reproducing environment, a switch is used to provide a switching between a two channel signal line and a multi channel signal line.

However, a sound reproducing apparatus having the conventional structure as described above has required an external signal for making distinction between a two channel and a multi channel when a switching between signals is performed.

A sound reproducing apparatus includes: a music signal source; a dividing circuit formed of at least one filter for dividing the music signal source into prescribed bands; a determining circuit for determining, based on an output from the dividing circuit, a frequency included in the music signal source; an adjusting circuit formed of at least one filter for adjusting the music signal source to have a prescribed frequency characteristic; and a switch circuit for switching an output of the adjusting circuit. An output from the determining circuit is used to control the switch circuit to output a signal adjusted to have a prescribed frequency characteristic.

The structure as described above allows, when channels having different frequency characteristics (e.g., a two channel source (e.g., CD) and a multi channel source (e.g., DVD)) are reproduced, the frequency characteristics of the music signal source themselves can be used to switch signal lines to adjust the multi channel source to have a prescribed frequency characteristic. As a result, when channels having different frequency characteristics (e.g., a woofer channel of DVD and CD) are reproduced by a single system, good speaker-reproduced sound can be realized.

FIG. 1 is a block diagram illustrating a sound reproducing apparatus in Embodiment 1 of the present invention.

FIG. 2 is a frequency characteristic diagram illustrating an input signal of a music signal source in Embodiment 1 of the present invention.

FIG. 3 is a frequency characteristic diagram illustrating an output signal of the first adjusting circuit in Embodiment 1 of the present invention.

FIG. 4 is a frequency characteristic diagram illustrating another input signal of the music signal source in Embodiment 1 of the present invention.

FIG. 5 is a block diagram illustrating a sound reproducing apparatus in Embodiment 2 of the present invention.

FIG. 6 is a block diagram illustrating a sound reproducing apparatus in Embodiment 3 of the present invention.

11 Music signal source

• Provisional Patent
• Utility Patent

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